The answer to whether urban outdoor furniture can be left outside year-round is: it depends primarily on the material and your local climate. High-quality furniture made from powder-coated aluminum, stainless steel, teak, or all-weather wicker is designed for permanent outdoor placement. These materials resist rust, rot, and UV damage. However, even durable pieces benefit from protective covers during harsh weather like heavy snow, hail, or intense sun to prolong their life and appearance.
For furniture with cushions, the frame may be weather-resistant, but cushions are not. They should be stored indoors or in a dry place when not in use, as constant moisture leads to mold and mildew. Furniture made from untreated iron, certain woods, or with delicate fabrics should ideally be stored during winter or rainy seasons.
In summary, check the manufacturer's specifications. For true "all-weather" pieces, you can leave them out with the aid of covers. For others or in extreme climates, seasonal storage is the safer choice to maintain your investment's beauty and functionality for years to come.